Method of producing belting



Patented Sept. 26, 1939 PAT ENT OFFICER...

METHOD OF PRODUCING BELTING Walter H. Tobey, overbrook Hills, Pa., assignor to Main Belting Company,; Philadelphia, Pa. a corporation of Pennsylvania No Drawing. Application March 2, 1937, Serial No. 128,652

1 Claim.

This invention relates to an improvement in the method of producing and more particularly relates to canvas belting.

The method in accordance with this invention is more particularly adapted for the production of driving belting, though it may be used in the production of belting for various purposes.

Belting in accordance with this invention will be found to be economical to produce and to possess desirable qualities to a superior degree rendering it highly efficient and economical in use. More specifically, belting in accordance with this invention and produced in accordance with the method thereof will be waterproof, will possess permanent flexibility and will be resistant to frictional wear and abrasion and to chemical action, as from acids, oil, fumes, etc.

Having now indicated in a general way the nature and purpose of this invention, I will proceed to a detailed description of a preferred embodiment thereof and of preferred procedures in accordance therewith.

In proceeding in accordance with the method embodying this invention for the production of a canvas belt, the canvas of any suitable or desired type will be folded and stitched in any usual and well known manner and then given a preliminary treatment with a mixture comprising essentially a drying or semi-drying oil and a mineral jelly, as petroleum.

The belting, having been preliminarily treated, as indicated, and before the drying or semidrying oil has completely oxidized, is treated with a mixture comprising essentially a cereal flour, casein and a drying oil. Finally and before the drying oil has completely oxidized, the belting is treated with a varnish.

Generally speaking, the preliminary treatment with a drying oil and petroleum jelly will result in impregnating the belting with these ingredients, which will act to render the belting soft and flexible and render it resistant to petroleum oils and grease. The second treatment with cereal, casein and a drying oil will result in sealing or filling the interstices of the canvas forming the belt and needle holes formed therein in the sewing. The final treatment with varnish will result in forming a coating on the belt which will seal in the body of the belt the partially oxidized oils, the cereal and casein and prevent further oxidation of the oils. At the same time, the treatment with varnish will render the belting waterproof and greaseproof.

As more specifically illustrative, the belting having been folded and sewed in any usual or desired manner, will be given a preliminary treatment in a hath made up on the following formula:

Gallons Heavy bodied fish oil 50 Double boiled linseed oil 50 Mineral jelly (Petrolatum) 10 Mineral spirits (U. M. & P. naphtha) Manganese drier (Japan) 3 The bath on the above formula will be readily formed by mixing the ingredients, in a suitable vessel, at a temperature of 85 F.-90 F. The mineral spirits may be omitted, but in such event the mixture will have to be warmed to render it suitably fluid for treatment of the belting. If desired, any desired color may be added to the above formula in amount of, for example, 5 gals. to every 100 gals. of the mixture.

For treatment of the belting with the mixture according to the above formula, the belting will be soaked in or run through the mixture contained in a suitable vessel and either warmed or containing the mineral spirits to render it fluid so that it will penetrate and impregnate the belting. When the belting has been thoroughly saturated with the above mixture and excess removed, the b-elting is permitted to dry until the drying oils have partially, but not completely, oxidized and then subjected to treatment with a second mixture made up on the following formula:

Hard wheat fiourm pounds 24 Borated casein do 5 Water gallons 15 Raw perilla oil do 15 Manganese drier (Japan) do 1 The above mixture will be prepared by dissolving the casein in the water heated to about 180 F. and then adding the flour to the solution, after cooling. When the flour is mixed in, forming a paste, the perilla oil will be added, then color in the amount of 1 gal, if desired, and finally the drier. If too heavy the mixture may be reduced with water.

coated with a varnish which may be made up on the following formula:

China-wood oil or similar drying 011 gallons 50 Ester gum or similar resin pounds 25 Litharge do 8 Bodied fish oil or similar gallons 5 Mineral spirits do 50 be applied thin and thorough drying permitted between coats.

On drying of the varnish the belting will be ready for use and will be found to possess and to retain exceptional flexibility, resistance to wear, water, grease, oil, acids, etc.

What I claim and desire to protect by Letters Patent is:

The method of producing belting which comprises foldingand stitching a length of canvas, impregnating the canvas with a mixture including a drying oil and a mineral jelly, permitting the drying oil to partially oxidize and before the drying oil has completely oxidized filling the canvas with a mixture including a drying oil, a cereal flour and casein, permitting the drying oil to partially oxidize and before the drying oil has completely oxidized coating the treated canvas with a varnish.

WALTER H. TOBEY. 

